Portable tool



Nov. 14, 1944. G, sPETH 2,362,943

PORTABLE TOOL Filed March 22, 1941 INVENTOR l LLOYD G. JPE''H ATTORNEY Patented Nov.14,1944

.STATES PATENT OFFICE '4 *Y .,I .I *2?362943` Y' f :PORTABLE 1001 Cleveland, Ohio, assignor 4 n Y toxThe Cleveland Pneumatic. Tool Company.

, Cleveland', Ohio, acorporation of Ohio Application Marchy 22, 1941,` Serial No. 384,675 't l .lolita-48) 'inventionl relatesbroadll'yf toai-r actuated vete'rs 0i'. 'Squeezerbut more particularly to.y an 'improved Vmanual control ,-ofthe throttlevalve thereof;

One obect of this-invention is to provide la pneumatic rivet squeezer. with afmain housing f tori-ning `a 'convenientgrip' by Whichllthe toollcan be grasped and held to .the work with 'a mtmmum. of 'eilif'ort rand Ifatigue to the operator.

Another'iobject ofthis invention y'is to produce A'such tool lr'nia'nually 'valve :controlling means located' at iarplace "readily'accessible "to, the operatothe vvlo'rk,` 5 Y Another object tof this invention is. to produce an "improved .actuated v`-toolfoi' `a size and shape adapted .tos titi .comfortably I in theA hand of .the .operator 'and provided '.withxaf'flud connection amdrtllirottlevalve'locatednl amanner calculated net-to intertere with the-:comfortable 1and v'nai-, ural halding'offthetoolbytlie operator.;

Other objects and advaftages: more or lless ancillary to the foregoing reside yin the specific .eonstructcn ands` `ageren-'p'mer'it of' the' elements pe'euliarto this as will' become apparent from amore. complete examination rof this kspecid flnztheadrawingk^- z f Figrlis aY longitudinal'vi'ew-.mostly in section terV when normallyjghaspingfand holdingthe tool ofagluid 'actuated rivet VsdueezfnremitodyingA the i invention.

Figi; 2V -af y1mgiti-man1.settima-1 View taken: in f aplaneindicated byline .2F-2in Figa-1:

lig.V V3 is- -a side elevationalfview gotfth'e lood-y pcrtioncfthetoolillustratingftnehand operated 1 .trigger associated with thethrottle valvefor con trtvllingA inletof motiveriluid tenthstool,l

`Figs. 4f and 5-, are viewsllooking the direction l of. thearrows 4-4fi-n lFigs andjillustr-atifng the throttle valine trigger-in diierent positionsf Figs. 6 andt'l are cross sectional views takenl on 2: planeindicated by line 6-&fin Fig. 2l and illustrating'zpartsfin diierentfpositions. I' v- Fig;8;is across secticnalaview taken .ina plane indicatedby line in Fig;

'Referring to? thedrawingnwhich illustrates a` preferred form of the. invention;` Ml` yrepresents a cylinder or power hofus'ing liavinfg'a closed' 'end 'l l.: Within the" housing is reciprocablyV mounted a. piston i2. formedwith "a peripheral groove I3 accommodating a packing ring I4. The groove I3 is in constant communication with the interior ofAk the 'cylinder` M 'throughl a. 'plurality of pistonl5f.' Centrallyfmountedionfthe side` ofthe pistonr vr12 remote-from :the closedjrendvi I; of the position by capscrews I6, Within which block is 8 extending mounted the large end' of a Wedge l This wedge 'longitudinally from Ythe piston 12.

'is secured to the Iblock Il against axialy movement relative thereto by 'a vcross pin I9 carriedhy the blockv IT and extending through laterally elongated slot provided Within the llarge end of the Wedge i8. The Wedge yhas one side 2l substantially parallel to the center axis of the cylinder IU, while the opposite side 220i the lWed-getapers toward the free end thereof'where it is terminatedy by a sharp incline '23. y

y Extending longitudinally from the open endof the cylindrical housing l0, there is a housing 'extension 2liy secured tothe cylinder'housing by .-capscrews 25. The free outer end of this exten# sion is properly shaped to form a clevis through Which extendsa bolt 26 secured in position b-y a nut 2l, on which bolt is pivotallymounted a lower jaw ZB'a'nd upper jaw 29,l the latter being shaped to straddle the former on' the bolt 26. The upper 'jaw 29- is provided with a tail end portion 30 extending into' the housing projection 24 above vthe Wedge I8 Where it is slotted as at 3l' to'accominodate two rollers 32 operatively' mounted on cross pins 34 extending through `Ithe Ahousing extension 24 andthe tail` portionxt ofthe jaw 29`asclearly'- shown in'Fig. 8; Like theV jaw 29, the lower jaw 28 `is provided` With a tail portion 35"'also extending inthe housing projection 24.

azidhaving the extreme end thereof slotte'd'as `at y36,'Witi1in which slot is disposed a' roller 3lA oper'- atively mounted on .a cross pin3'8 carried by the tail -portion 35.' Slidably carried bythe upper jaw 2&9; there is aspringpressedplunger 42 -active on' a lug '39 formed onthe lower J'aW 2'3 adjacent the; cross shaft 26, through which plunger pres-.- sure. is exerted: on the inclined side 22 of the Wedge 'l-Sfi'bfythe rollerv 3l.. Due to the ylaterally elongated vslot 2:0 through which passesthe cross laf-'the Wedge lfis freeY tovmove laterally relative to thepiston l2. Upon the press-ure exerted onfitsside 22. bythe roller 31, the Wedgev i8 be moved and maintained in operative en'.-

' gaigxeinentzof'its side'2il withv the rollers 32. An

adjustable stop: the form of a set screw llt)Y carried by theI housing extension 2.4 below the Ijaw 2:8 vand engageaole With'the latter, limits the openingmovement oiV the'aw 'orme-re, particularly the inwardf'mcvement' ofi its'roller 31. AThe jaws-28 andfsxareeach provided 'with a terminal portion MV diametrically opposed to` each other and carrye ing adinstablefdie 43.*exztending toward each other -and'securable'in position'loy, a lock nut 44.

Figs. 1 and 3 formed with a screw threaded bore 49r adapted to receive one end of a fluid conveying conduit, not shown. The boss 48, although preferably an integral part of the housing I0, is so designed that its upper end terminates below the periphery of said housing so as to enable convenient gripping thereof when holding the tool to the work. The bore 49 opens into a flat bottom bore 50 extending axially therefrom through the boss 43 and within the front portion of which is pressed a bushing 5| formed with three differential inner diameters 52, 53 and 54, the diameter 54 being adjacent to the inner end of the bore 50. Slidable within the bushing 5I there is a throttle valve generally designated by 55 having a head 56 adapted to seat on the inner end of the bushing 5| for closing the bushing from the threaded bore 49. This throttle valve is constantly urged into closed position of its head relative to the bushing 5| by a compression spring 51 interposed between the head 56 and the flat bottom of the bore 50. The other end of the valve 55 is provided with a knob 58 protruding from the boss 48 and slidably mounted within the bore 52 of the bushing 5|. The knob 58 is united to the head 56 by a reduced stem59 having adjacent the knob 58 an enlarged portion 69 fitting within the bore 53 of the bushing 5 I. Leading from the inner end of the bore 52 below the knob 58 of the valve 55, there is an exhaust port 6I opening to the atmosphere. A port 62 opens from the interior of the cylinder I through the closed end Il into the bushing below the enlarged portion 69 of the stem 59 and always opened relative to the head 56 of the valve 55.

Active on the knob 58 of the throttle valve 55, there is a latch 63 carried by a rod 64 which extends longitudinally therefrom through the side wall of the housing cylinder III and 'is terminated outside of the cylinder I0 and above the cylinder extension 24 with a trigger or thumb plate 65, located in a manner calculated to receive the thumb of the operator when normally holding the tool to the work. In practice the thumb plate or trigger 65 is preferably made an integral part of the rod 64, while the latch 63 is detachably secured on the rod 64 by any suitable means such as a set screw 66. The latch 63 also has depending therefrom a lug 61 engageable with the boss 48 for limiting pivotal movement of the latch away from the valve 55.

The operation of the tool is as follow:` Assuming that the piston I2 is located at the inner end of the cylinder housing I0, that is,in

the position shown in Figs. 1 and 2, and thaty motive uid is admitted into the threaded bore 49 from any source of supply to normally cooperate with the spring 51 for holding the throttle valve 55 in closed position as shown in Fig. 6. In this instance, the cylinder I0 is in communication with the atmosphere through the port 62, the bore 53 of the bushing 5| and the exhaust port 6|, thereby venting the cylinder and enabling the returnbf the piston I2 toward the closed end II by means of the compression the compression spring 51.

springs 46 active on the piston I2. During this return stroke of the piston, the wedge I8 will slide between the rollers 32 and 31 to afford opening movement of the jaws 2B and 29 through the action of the spring pressed plunger 42 on the lug 39 of the jaw 28.

When it is desired to effect the closing movement of the jaws 28 and 29 or more particularly the movement of the dies 43 toward each other toperform the work, the throttle valve 55 may be pressed inwardly into open position by the operator exerting pressure on the trigger 65, thus causing pivotal movement of the rod 65 and of the latch 63 in a clockwise direction in Figs. 6 and 7 and the consequential inward movement of the valve 55 against the action of In this instance, the exhaust port y6I is cut off from the port 62 by the enlarged portion 69 of the valve stem 59 which ts closely within the bore 53 of the bushing 6|. Concurrently, the port 62 is brought in communication with the inner end of the bore 50 by the valve head 56 now spaced from the bushing 5|, thereby enabling the flow of motive fluid from the bore 49 into the port 62 and therefrom into the cylinder I0 to act on the piston I2. Under the action of the motive fluid the piston will be driven forwardly or away from the closed end II of the cylinder IIJ causing corresponding motion to the wedge I8 for effecting closing movement of the jaws through the engagement of the roller 31 with the inclined side 22 of the wedge I8. During this working stroke of the piston the motive fluid will also be admitted in the groove I3 through the ports I5 for acting on the packing ring I4 to assure a fluidA tight joint between the piston and the inner wall of the cylinder housing I0. The working stroke of the piston is limited by its engagement with the inner end of the housing extension 24 located within the corresponding end of the cylinder II), as clearly shown in Fig. 2.

From the foregoing, it will be understood that the cylinder housing I0 located at the rear of the operating jaws 28 and 29 forms a handle grip adapted to t comfortably in the hand of the operator and that the throttle valve operating trigger 65 is conveniently located to receive the thumb of the operator without necessitating his relinquishing the grip of the tool. The throttle valve 55 within the boss 48 which forms an integral part of the closed end II, is located away from the operators hand, thereby preventing the fluid conveying conduit connected to the housing by means of the threaded bore 49 to interfere with the operators hand. The improved rivet squeezer above described forms a compact and efficient tool adapted to be held and operated by one hand, leaving the other one free to perform related tasks.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specic terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

1. A portable iluid actuated tool including an elongated power housing forming a handle grip for the operator to hold the tool to the work.

fluid pressure responsive means within said power housing, jaws extendingy longitudinally from the frontend of said housing operable by said fluid pressure responsive means, a throttle `valve slidable within the rear end 'wall of said housing,

a manually operable trigger near the front end of said housing positioned to be operated comfortably by the thumb of the hand of the operator while normally holding the tool to the Work,

kand means including a rod leading from said trigger along said housing to said throttle valve and rotatable by depressing said trigger foroperating the throttle valve to actuate said uid pressure responsive means.

2. In a portable iiuid actuated tool including 15` an elongated housing forming a handle adapted f y to be gripped byfone hand of the operator, a

.boss at the rear of said housing, a spring pressed rlimit the movement' of said rod and trigger away from operating position.

LLOYD sPE'rH; 

